#233F99#233F99

#233F99 is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.5% C 0.151 H 266.4°. Best body text is #FFFFFF at 9.36:1 contrast (WCAG AA passes).

Color values

HEX	#233F99
RGB	rgb(35, 63, 153)
HSL	hsl(226, 63%, 37%)
HSV	hsv(226, 77%, 60%)
CMYK	cmyk(77.1%, 58.8%, 0%, 40%)
CIE-LAB	lab(29.94, 23.08, -52.22)
CIE-LCH	lch(29.94, 57.09, 293.85°)
OKLab	oklab(40.46% -0.0095 -0.1507)
OKLCH	oklch(40.46% 0.151 266.4)
XYZ	xyz(8.2184, 6.2113, 30.8966)
Luminance	0.0621 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233F99 #997D23

analogous

#237A99 #233F99 #422399

triadic

#233F99 #99233F #3F9923

tetradic

#233F99 #99237A #997D23 #239942

square

#233F99 #99237A #997D23 #239942

split-complementary

#233F99 #994223 #7A9923

monochromatic

#0C1635 #182A67 #233F99 #2E54CB #5D7ADA

Accessibility & contrast

On white

9.36

#233F99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#233F99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233F99

9.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233F99	#FFFFFF	#000000	##FFFFFF
##233F99	1.00	9.36	2.24	9.36
#FFFFFF	9.36	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004C9C

Deuteranopia (green-blind)

#004197

Tritanopia (blue-blind)

#005665

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #233f99;
/* rgb */ color: rgb(35, 63, 153);
/* oklch */ color: oklch(40.5% 0.151 266.4);

Tailwind

colors: {
  custom: {
    50: '#7173b8',
    500: '#233f99',
    950: '#000000',
  },
}

SCSS

$custom: #233f99;
$custom-light: #7173b8;
$custom-dark: #000000;

JSON

{
  "hex": "#233f99",
  "rgb": {
    "r": 35,
    "g": 63,
    "b": 153
  },
  "hsl": {
    "h": 225.763,
    "s": 62.766,
    "l": 36.863
  },
  "oklch": {
    "l": 0.40463,
    "c": 0.15103,
    "h": 266.4
  },
  "luminance": 0.06212
}

Semantic roles & 50–950 ramp

primary

#233F99

secondary

#BEA659

accent

#BF42E6

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090811

muted

#7B7B80

Preview Lab

Preview with #233F99

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →